As long as the urethra burns, it may be caused by urinary tract infection, prostatitis, trichomoniasis and other reasons. 1. urinary tract infection: as long as the urethra burning may be caused by urinary tract infection, the urinary tract by bacterial or viral infection, will directly stimulate the urethral mucosa. Clinical manifestations of urinary frequency, urinary urgency, urinary pain, bladder area or perineum discomfort and urethral burning sensation. 2. Prostatitis: The prostate is an organ adjacent to the urethra, and if the prostate is infected with inflammation, it will cause the inflammation to spread to the urethra, making the urethra burn. The patient will also be accompanied by chills, fever, fatigue, urinary frequency, urinary urgency, and even acute urinary retention. 3. Trichomonas vaginitis: as long as the urethra burning during intercourse may also be caused by trichomonas vaginitis, trichomonas vaginitis is a common gynecological pathogen infection. Early on, there are no obvious symptoms, the symptoms of the acute phase of the vulva and the vaginal opening itching, burning, leukorrhea increased putrid odor, often accompanied by pain in sexual intercourse and so on. There are many reasons for urethral burning during intercourse, and it is recommended that patients go to the hospital in a timely manner, under the guidance of the doctor to clarify the cause of the disease and then treatment.